the monitor is the thing that has the screen for you. The cpu is the thing that has the chips in the motherborad. the motherborad is the main thing for all the data. the ram is the thing that gamers can put in for better games. they put in up to 4 sticksin the computor. the video card put the picures onto your screen. the pwer supply is the thing that gives it the power. the hard drive is the thing that saves all the data.